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Ordering number:EN3221A
Monolithic Digital IC
LB1648
Dual Bidirectional Motor Driver
Overview
The LB1648 is a dual bidirectional motor driver. It is especially suited for reel motor in cassette deck.
Package Dimensions
unit:mm 3022A-DIP12F
[LB1648]
Features
* 2-input logic can be used to exercise control of bidirectional driving, braking and open. * Output voltage variable by use of external Zener diode. * On-chip thermal protector.
SANYO : DIP12F
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Input voltage Output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VIN IO Pd max Topr Tstg Conditions Ratings 18 18 0.8 1.9 -25 to +75 -55 to +125 Unit V V A W
C C
Allowable Operating Conditions at Ta = 25C
Parameter Supply voltage Symbol VCC Conditions Ratings 7 to +16 Unit V
Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications. SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquaters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
82098HA (KT)/7310TS/1220TA, TS No.3221-1/7
LB1648
Electrical Characteristics at Ta = 25C, VCC=12V, per channel
Parameter Current drain Symbol ICC1 ICC2 ICC3 Output leakage current Input threshold voltage Output voltage Output transistor saturation voltage (upper) Output transistor saturation voltage (lower) VZ pin flow-out current IOL Vth VO Vsat1 Vsat2 IZ Conditions Pin 1 forward, RL=, VZ=4V Pin 7 forward, RL=, VZ=4V Pin 7 opern, RL= Braking mode, RL=, per output pin RL= VZ=4V, IOUT=85mA IOUT=200mA IOUT=400mA IOUT=200mA IOUT=400mA VZ=4V, IOUT=0mA 0.55 0.9 3.75 Ratings min typ 15 14 1.5 40 1.05 4.0 1.9 2.0 0.3 0.5 0.85 max 22 20 3 120 1.20 4.25 2.3 2.4 0.55 0.7 1.15 Unit mA mA mA A V V V V V V mA
Equivalent Circuit Block Diagram
Logic Section Truth Table
Note : A capacitor of 0.01F or grater must be connected across VCC1, 2 and GND
No.3221-2/7
LB1648
Sample Application Circuit
Test Circuit (1channel)
No.3221-3/7
LB1648
Internal Circuits Input Circuit
Output Circuit
Circuit of Pin VZ
No.3221-4/7
LB1648
Design Notes 1 : Maximum voltage, maximum current A voltage greater than the supply voltage, 7 to 16V, specified in the Allowable Operating Conditions must not be applied to pins 1 and 7. The maximum current is 0.8A (peak). The rush current at the time of start must not exceed the peak current. 2 : Output transistor protection A resistor (or for fuse resistor) must be connected to the VCC line to provide protection against output short, output pin-to-GND short. 3 : Wiring The bypass capacitors connected across pins 1, 7 and GND must not have an impedance common to other lines, The GND line must be separated from other circuits. 4 : Provision against oscillation In applications where motors with brush are used, a capacitor may be connectd across both terminals to prevent the spark-caused noise. This capacitor is connected across the output pins of the LB1648, which may cause oscillation to occur. In this case, the capacitor value must be made as small as possible or a resistor must be connected in series. 5 : External Zener diode The current flowing out of the VZ pin varies with the load and its maximum value is approximately 1.2mA. If you use a Zener diode of soft clip type and need an accuracy in voltage, a current required for the Zener diode must be supplied externally.
No.3221-5/7
LB1648
No.3221-6/7
LB1648
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any and all SANYO products described or contained herein fall under strategic products (including services) controlled under the Foreign Exchange and Foreign Trade Control Law of Japan, such products must not be exported without obtaining export license from the Ministry of International Trade and Industry in accordance with the above law. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co. , Ltd. Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use. Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of August, 1998. Specifications and information herein are subject to change without notice.
PS No.3221-7/7

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